Features: Large capacity with 4000mAh, it can charge phone for many times. Safe and no explosion. Durable and reusable, it can be full charged itself under the sunlight. Environmentally-friendly, using renewable natural resource. Unique design with a hook, built-in LED and power indicator light. Non-slip for its arc design, preventing slippery and damaging. Handy and portable, so you can carry with you when camping or having a trip. Double USB outputs, so you can charge two devices at the same time and discharge. Clear interface, LED can show its power. Powerful with longer operation time. Super waterproof and dustproof. Strong shockproof and drop resistance. Energy-saving when no loading, it will auto power-off. Widely compatible, it fits for mostly devices, including all kinds of smart phone, MP3, MP4, iPad and ipod. Multifunctional movable charger as an emergent LED light or SOS distress signal to help other people find you. Suitable for outdoor travel.